1986712823 has 2 divisors, whose sum is σ = 1986712824. Its totient is φ = 1986712822.

The previous prime is 1986712811. The next prime is 1986712829. The reversal of 1986712823 is 3282176891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1986712823 - 2¹⁰ = 1986711799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986712829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993356411 + 993356412.

It is an arithmetic number, because the mean of its divisors is an integer number (993356412).

Almost surely, 2^1986712823 is an apocalyptic number.

1986712823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986712823 is an equidigital number, since it uses as much as digits as its factorization.

1986712823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 1986712823 is about 44572.5568371392. The cubic root of 1986712823 is about 1257.1247158250.

The spelling of 1986712823 in words is "one billion, nine hundred eighty-six million, seven hundred twelve thousand, eight hundred twenty-three".